“Subterranean” thing about this popular live music venue is the string of prohibition-era tunnels secreted away beneath the hundred-year-old building’s foundation, long forgotten amid the pounding rock, punk, and varying DJ performances that shake the space’s walls every night. Music lovers looking for house, reggae, and hip-hop DJs hang out at the ground floor SubT Lounge, which features local art, a retro orange-lit bar, an open dance floor, and an array of black vinyl couches for the casual groups of after-work professionals and hipsters who show up to shake off the day.